Vegetable Casserole with Zucchini Crust and Melted Cheese
A lighter take on lasagna that swaps pasta for a baked zucchini and carrot base, topped with creamy sour cream, melted cheese, and salsa. The grated vegetables form a firm crust that holds the rich dairy and salsa layers. Serve this weeknight casserole warm from the oven to a family seeking comfort food without the pasta heaviness. The version works well for those managing carb intake or wanting vegetable-forward meals.
Ingredients
- 3 cups zucchini, coarsely grated
- 1 ½ cups carrot, coarsely grated
- 1 teaspoon salt, or to taste(optional)
- ½ teaspoon black pepper, or to taste(optional)
- 1 large egg, beaten, or egg replacer or flax eggaquafaba (3 tablespoons) or commercial egg replacer per package1:1vegan
makes casserole dairy-free with dairy-free sour cream and cheese
Full guide → - 1 ½ cups sour cream, or Tofutti
- 3 ½ cups shredded cheese, loosely packed
- 16 ounce salsa, from jarpico de gallo or fresh tomato sauce0.5:1lower-sodiumfresher
reduces processing, allows custom seasoning
Full guide →
Instructions
- 1
Preheat oven to 400F and line a 9-by-9-inch pan with foil, spray with cooking spray.
- 2
Combine grated zucchini, grated carrot, salt, pepper, and beaten egg in a large bowl; toss until vegetables are coated.
- 3
Transfer mixture to prepared pan, pack lightly and smooth the surface with a spatula.
- 4
Bake until vegetables begin to brown on top and firm up, about 25 to 28 minutes.
- 5
Spread sour cream evenly over the vegetable crust.
- 6
Sprinkle about half the cheese uniformly over sour cream.
- 7
Drizzle salsa uniformly over cheese.
- 8
Top with remaining cheese, sprinkled uniformly.
- 9
Bake until cheese browns and top is bubbly and golden, about 35 to 40 minutes.
- 10
Cool at least 10 minutes before slicing and serving.
Tips
Vegetable moisture dictates baking time for the crust. If zucchini and carrot release excess water, the crust takes longer to firm. Watch for browning rather than following time exactly.
Let the finished casserole cool 10 minutes so layers set and hold together when sliced. Cold leftovers slice cleanly too.
Good to Know
Refrigerate in an airtight container up to 5 days. Freeze up to 3 months. Thaw overnight in refrigerator before reheating.
Assemble through the sour cream layer, cover, and refrigerate up to 12 hours. Add cheese and salsa, then bake as directed, adding 5-10 minutes to baking time if cold.
Serve warm from the oven with a simple green salad or roasted vegetables on the side. Cold leftovers also work well for lunch.
Common Mistakes
Do not skip the initial vegetable bake step to avoid a watery, soupy casserole that won't hold when sliced.
Do not skip the 10-minute cooling period to avoid casserole falling apart when serving.
Do not pack the vegetable mixture too densely to avoid a dense, heavy crust.
Substitutions
Dairy-Free Swaps
Vegan Options
makes casserole dairy-free with dairy-free sour cream and cheese
Full guide →General Alternatives
reduces processing, allows custom seasoning
Full guide →FAQ
Can I make this casserole ahead of time?
Yes. Prepare through the sour cream layer, cover, and refrigerate up to 12 hours. Add cheese and salsa just before the second bake, adding 5-10 extra minutes since the casserole will be cold.
Can I freeze leftovers or the whole casserole?
Yes. Freeze in an airtight container or covered pan up to 3 months. Thaw overnight in the refrigerator, then reheat covered at 350F until warm, about 20-25 minutes, or eat cold.
What if my vegetables release too much water during baking?
Pat grated zucchini and carrot with paper towels before mixing to remove excess moisture. Salt draws out water; if using full teaspoon, salt the vegetables 15 minutes ahead and drain.