Easy Cheesy Mac And Cheese (With Optional Crunchy Topping)

Ingredients (6)

• ✓ 1 (16 ounce) package elbow macaroni
• + 4 cups shredded sharp Cheddar cheese, divided add to pantry
• + 1 (15 ounce) jar Alfredo sauce add to pantry
• + 2 tablespoons mustard add to pantry
• + 1 (10 ounce) can diced tomatoes and green chiles (such as RO*TEL®), drained add to pantry
• + ½ cup bread crumbs add to pantry