This Savory Yellow Squash Casserole with Herb Crunch is a delightful dish that transforms simple ingredients into a comforting, flavorful meal. It's a perfect way to celebrate the bounty of summer squash and sneak in some extra veggies without sacrificing taste.
Yellow squash and zucchini are the stars of this dish, offering a mild, slightly sweet flavor that pairs well with the creamy sauce. Onions add a base of savory flavor, while olive oil helps to sauté the vegetables and enhance their natural sweetness. Salt and black pepper are simple seasonings that bring out the best in the veggies.
Cheddar cheese and Parmesan cheese provide a rich, cheesy depth. Sour cream and mayonnaise create a creamy, tangy sauce that coats the vegetables. Butter crackers add a buttery, crunchy topping, while fresh basil and parsley introduce a burst of freshness. Unsalted butter helps to bind the topping together.
This casserole pairs wonderfully with grilled chicken or fish for a complete meal. It's also great alongside a fresh green salad with a light vinaigrette, which cuts through the richness of the casserole. Consider serving with a chilled glass of white wine to complement the cheesy, herby flavors.
First, preheat your oven to 350°F (175°C). This ensures it's ready for your casserole once everything's prepped. In a large skillet, heat up the olive oil over medium heat. Toss in the diced onions and let them sauté until they turn translucent — about 5 minutes should do it. You'll notice a lovely aroma as they soften.
Next, add the sliced yellow squash and zucchini to the skillet. Season with salt and black pepper. Let them cook for another 5 minutes until they're tender. You'll want them soft but not mushy, retaining a bit of bite.
In a large mixing bowl, combine the sautéed vegetables with the cheddar cheese, Parmesan cheese, sour cream, and mayonnaise. Stir until everything is well mixed. Transfer this mixture into a greased 9x13 inch baking dish, spreading it out evenly.
Now, for the topping: in a separate bowl, mix together the crushed butter crackers, fresh basil, parsley, and melted butter. Make sure the butter coats the crackers nicely, as this will help it brown beautifully in the oven. Sprinkle this mixture evenly over your casserole.
Bake in your preheated oven for 25-30 minutes. You'll know it's done when the top is golden brown and you see the edges bubbling. Let it cool for a few minutes before serving — this will help it set a bit and make serving easier.
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