This John Wayne Casserole is a hearty, flavorful dish featuring a biscuit base topped with seasoned ground beef, sautéed vegetables, a creamy sour cream-mayonnaise blend, and a generous layer of melted Cheddar cheese, garnished with fresh tomatoes and jalapeños. It's a robust, crowd-pleasing meal.
For best flavor, ensure the ground beef is well-browned and any excess fat drained before adding taco seasoning. Sautéing the onions and bell peppers until tender and slightly caramelized will deepen their sweetness and integrate better into the filling. When pressing the biscuits, aim for an even layer to ensure consistent baking. For extra richness, consider using full-fat sour cream and mayonnaise. Don't overbake once the cheese is added, as this can make the casserole dry; bake just until bubbly and golden.