Chopped Cheese Sandwiches | America's Test Kitchen

Ingredients

• 1 pound 85 percent lean ground beef
• 1 onion , chopped fine
• 1 teaspoon Goya Adobo All Purpose Seasoning
• 1 teaspoon Lawry's Seasoned Salt
• 4 (8-inch) sub rolls , split
• 1/3 cup mayonnaise
• 2 tablespoons ketchup
• 8 slices yellow American cheese (8 ounces)
• 12 thin tomato slices (2 tomatoes)
• 2 cups shredded iceberg lettuce