Thermomix Tuna Sausage with Caper Sauce

Prep: 15 minCook: 43 min4 servingsmediumFrench
Thermomix Tuna Sausage with Caper Sauce

A French-style tuna sausage crafted in the Thermomix, combining canned tuna, fresh parsley, Parmesan, and breadcrumbs into a tender loaf steamed in the Varoma. The dish delivers subtle briny depth from black olives and capers, balanced against bright lemon and the umami punch of Parmesan. What sets this version apart is its all-in-one Thermomix method, which simplifies mixing and cooking while keeping the tuna moist and delicate. The accompanying caper sauce—made from pureed capers, olive oil, and lemon—adds piquant contrast without overwhelming the delicate fish. Perfect for weeknight dinners seeking elegance without fuss, or light lunches when paired with greens. This recipe suits home cooks wanting restaurant-quality results with minimal cleanup.

Ingredients

4 servings
  • ½ oz fresh parsley, leaves only
    chives1:0.75herb

    milder onion note replaces herbaceousness

    Full guide →
  • 2 oz Parmesan, cut into chunks
    Pecorino Romano1:1cheesedairy-free

    sharper flavor, similar binding properties

    Full guide →
  • 4 black olives, pitted
    green olives1:1ingredient

    less briny, slightly more vegetal

    Full guide →
  • 11 oz canned tuna, drained
    fresh tuna1:1protein

    use poached or steamed fresh tuna finely flaked

    Full guide →
  • 2 eggs, whole
  • 1 oz breadcrumbs
    crushed crackers1:1bindergluten-free

    adds slight salt, same structure

    Full guide →
  • 1 ½ cups water
  • 1 ¼ oz capers
  • 4 tbsp olive oil
  • 1 tbsp lemon juice, fresh
    white wine vinegar0.5:1acid

    sharper bite, less floral

    Full guide →

Instructions

  1. 1

    Pulse fresh parsley leaves with Parmesan chunks until combined.

  2. 2

    Add pitted black olives, drained canned tuna, eggs, and breadcrumbs; mix until just combined.

  3. 3

    Shape mixture into a log, wrap tightly in parchment paper, and place in the Varoma steamer basket.

  4. 4

    Add water to the bowl and insert the Varoma.

  5. 5

    Steam until cooked through.

  6. 6

    Rinse and drain capers, then pulse with olive oil and lemon juice until chunky.

  7. 7

    Warm the caper sauce gently.

  8. 8

    Cool the tuna sausage, slice, and serve with caper sauce spooned over top.

Tips

Tip 1

Drain tuna thoroughly and squeeze gently to remove excess liquid before adding to the processor. Excess moisture weakens the batter and prevents the sausage from holding its shape during steaming.

Tip 2

Wrap the sausage firmly in parchment with a tight spiral to maintain even thickness. Loose wrapping allows steam to penetrate unevenly, creating dense patches.

Tip 3

Pulse the caper sauce just until chunky, not smooth. Over-processing releases bitter compounds from the capers and creates an unpleasant grainy texture.

Good to Know

Storage

Refrigerate sliced sausage in an airtight container up to 3 days. Store sauce separately in a covered jar up to 4 days.

Make Ahead

Shape and wrap the sausage up to 1 day ahead; steam fresh when ready. Make caper sauce 1 day prior; rewarm gently over low heat or serve cold.

Serve With

Serve chilled or at room temperature with crusty bread, mixed greens, or alongside roasted vegetables. Pairs well with dry white wine or crisp rosé.

Common Mistakes

Watch

Do not over-mix the tuna batter to avoid creating a dense, rubbery texture that falls apart during cooking.

Watch

Do not skip draining the capers to avoid excess brine overwhelming the delicate sauce balance.

Watch

Do not wrap the sausage loosely to avoid uneven cooking and a dry exterior.

Substitutions

Dairy-Free Swaps

Parmesan
Pecorino Romano1:1cheesedairy-free

sharper flavor, similar binding properties

Full guide →

Gluten-Free Swaps

breadcrumbs
crushed crackers1:1bindergluten-free

adds slight salt, same structure

Full guide →

General Alternatives

canned tuna
fresh tuna1:1protein

use poached or steamed fresh tuna finely flaked

Full guide →
fresh parsley
chives1:0.75herb

milder onion note replaces herbaceousness

Full guide →
black olives
green olives1:1ingredient

less briny, slightly more vegetal

Full guide →
lemon juice
white wine vinegar0.5:1acid

sharper bite, less floral

Full guide →
Find more substitutions →

FAQ

Can I make this without a Thermomix or Varoma?

Yes. Mix ingredients by hand or food processor. Wrap the sausage and steam in a standard steamer basket over boiling water, or bake wrapped in parchment at 180C for 30-35 minutes. For the sauce, finely chop capers and whisk with olive oil and lemon.

Can I freeze the tuna sausage?

Freeze uncooked wrapped sausage up to 1 month. Thaw overnight in the refrigerator, then steam as directed. Cooked sausage freezes up to 2 months; thaw and serve cold or reheat gently. Freeze caper sauce separately up to 1 month.

What if the sausage breaks apart during cooking?

The mixture likely contains too much moisture or insufficient binder. Ensure tuna is thoroughly drained, use the exact breadcrumb amount, and wrap very tightly in parchment. A broken sausage can be shredded and served as a coarse tuna mousse with the caper sauce.