15 Veggie-Packed Casseroles for Summer Get-Togethers

Thin slices of zucchini wrap around a creamy filling of ricotta and Parmesan cheese and are nestled in a creamy pesto sauce in this light and summery vegetarian casserole.

Vegetable gratin recipes often have a crunchy breadcrumb or crouton topping. But summer tomatoes are too gorgeous to hide, so we tucked crusty cubes of bread underneath them instead. Plus, the bread soaks up all the juicy tomato goodness. If you can't find marjoram, fresh basil or oregano makes a good substitute.

This light and fluffy poblano corn casserole has sweet corn and mildly spicy pepper in every bite. Self-rising cornmeal gives it texture and lift, while the cheese and cream cheese make it rich and creamy.

If you don't have a spiralizer to make this healthy zucchini noodle casserole (aka zoodles), use a vegetable peeler to make long thin strips of the squash and zucchini, stopping when you reach the seedy center. Just a few minutes under the broiler gives these ricotta-and-basil-filled nests a light golden top.

No gloppy canned soup in this healthy green bean casserole recipe. Simply give cilantro, parsley or chives (or a mix of all three) a whirl in the food processor to make the pesto-like sauce that ties the casserole together.

This healthy casserole is essentially a crustless quiche, brimming with fresh summer vegetables. Bake it up for an elegant summer brunch or a casual backyard barbecue.

This yellow squash casserole is a great rendition of the classic—it's still super cheesy, but much healthier for you. Look for medium or even small yellow squash, as large ones tend to water out more. Be sure to remove as much water as possible after boiling the veggies and before assembling the squash casserole so it doesn't get soupy.

Eggplant soaks up the flavors of ginger, garlic and tamari in this Asian-inspired casserole recipe. A hot pepper in the topping adds a bit of heat, but opt for sweet if you prefer.

This one-skillet dinner features the flavors of a summer caprese salad. Fresh tomatoes and basil are combined with chicken and pasta and cooked in a creamy sauce before being topped with a layer of melted mozzarella. A good-quality balsamic vinegar and a sprinkling of fresh basil completes the dish.

You can assemble this healthy chicken casserole before you leave for a party and pop it in the oven at the host's house. Or bake it at home and bring it along--it's delicious at room temperature too.

The coolest way to make classic eggplant parm--and easier too! Use the hasselback technique to make partial cuts into the whole eggplant every 1/4 inch or so to fill up with melty cheese, flavorful sauce and crunchy breadcrumbs.

The lasagna that cuts carbs, boosts your veggie servings and is gluten-free: this easy dinner recipe uses slices of roasted eggplant and zucchini as the "noodles" in this healthy lasagna.

Summer's harvest--eggplant, corn and zucchini--stars in this healthy, Mexican-inspired casserole that's perfect for serving a crowd or for a dinner with leftovers for the next day.

Inspired by queso fundido--melted Mexican cheese dip--this corn and warm Cheddar cheese dip is great with toasted baguette.

The potatoes are perfectly tender in this easy Gruyère potato casserole. The cheese gets brown and crispy on the top and sides and the herbs add a nice accent to this savory dish.