Step 1
Season steaks liberally with salt and pepper and grill to rare.

Step 2
In skillet over medium-high heat, melt butter and onions. Season with salt and pepper. Cook stirring frequently until light brown. Remove from heat.

Step 3
Thinly slice steaks and cut into thirds. Mix steak with onions and warm for a few minutes.

Step 4
Arrange layer of TOSTITOS^® on oven-proof platter. Top with salsa, half of steak mixture, and half of cheeses. Repeat with additional layer. Place platter in 400° oven for 3-5 minutes to melt cheese.

Step 5
Top with TOSTITOS^® Avocado Salsa Dip and serve.