Taco Pasta Casserole With Cheesy Beef Filling - Quickie Recipe

Ingredients

• 12 oz (340 g) medium pasta shells
• 1 tablespoon olive oil
• 1 lb (450 g) lean ground beef
• 1 small yellow onion, diced
• 3 cloves garlic, minced
• 2 tablespoons taco seasoning
• 1/2 teaspoon kosher salt, plus more for pasta water
• 1 cup (240 ml) salsa, mild or medium
• 1 can (10 oz or 283 g) diced tomatoes with green chiles, undrained
• 1 can (15 oz or 425 g) black beans, drained and rinsed
• 1 cup (150 g) frozen corn
• 1/2 cup (120 g) sour cream
• 2 cups (225 g) shredded Mexican blend cheese, divided
• 1/4 cup chopped fresh cilantro
• 1 cup crushed tortilla chips
• Sour cream, sliced scallions, or jalapenos, optional