Favoreats
Favoreats LLC
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INGREDIENTS
1 lb
Ground chuck
2
Yellow onions, halved and thinly sliced (about 4 cups), medium
1/4 cup
Mayonnaise
1/2 tsp
Black pepper, freshly ground
1 tsp
Kosher salt
8
slices Rye bread, light
2 tbsp
Butter, unsalted
8 oz
Swiss cheese