Tomato Mac and Cheese | Paula Deen

Ingredients

• 4 tablespoons plus more for baking dish Butter
• 2 cups uncooked elbow macaroni
• 2 tablespoons minced onion
• 4 tablespoons all purpose flour
• 1 teaspoon plus more for seasoning salt
• 3/4 tablespoon dry mustard
• 1/4 teaspoon paprika
• 2 cups milk
• 3 cups shredded, divided cheddar cheese
• 2 ripe blanched, peeled, and cut into 1/2-inch thick slices tomatoes
• freshly ground Black pepper