Caramelized Beer-Onion and Bacon Burgers

(at least 80%) ground beef, lean

slices Bacon

Leaf lettuce or red romaine lettuce, leaves red

Sweet onions, thinly sliced (about 1 1/2 lb), large

slices Tomato

Pepper

Salt

Kaiser rolls or crusty rolls

slices (about 3/4 oz each) cheddar or american cheese

bottle Pilsner style beer