Step 1

Preheat oven to 350°. In a large skillet, saute zucchini and pepper in oil until pepper is crisp-tender. Add garlic; cook 1 minute longer. Add the corn, beans, salt and cumin; saute 2-3 minutes longer. Stir in salsa and cilantro.

Step 2

Place a tortilla in the bottom of a 1-1/2-qt. round baking dish coated with cooking spray. Spread with 2/3 cup vegetable mixture; sprinkle with 1/4 cup cheese. Repeat layers twice.

Step 3

Bake, uncovered, until heated through and cheese is melted, 20-25 minutes. Let stand 10 minutes before serving. If desired, serve with sour cream.