Easy Hamburger Corn Casserole

Ingredients

• 2 lbs lean ground beef
• spray vegetable oil
• 1 1/2 cups onions, chopped
• 5 cloves garlic, chopped (or less)
• 1 tablespoon chili powder (or more)
• 1 teaspoon crushed red pepper flakes
• 2 (14 ounce) cans kernel corn or 4 ears fresh corn, cooked
• 1 (28 ounce) can diced tomatoes (Ilike to use Italian flavored)
• 1 cup beef broth
• 2 tablespoons cornstarch