Blend refried beans and salsa in a small bowl. Spread evenly over frozen burgers and place in a microwave-safe dish. Cover with plastic wrap, folding back one corner.

Microwave burgers on high 4-5 minutes, turning dish halfway through heating time, until burgers are piping hot.

Coarsely crush corn chips.

Spread mayonnaise on buns. Top bottom half of each bun with lettuce and tomato slices; top with burgers, bean side up.

Sprinkle corn chips evenly over beans. Lay remaining buns on top and press gently.

Courtesy of the Texas Beef Council