Favoreats
Favoreats LLC
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INGREDIENTS
2 tsp
vegetable oil
1
large onion, thinly sliced
1 tsp
salt
1/8 tsp
black pepper
2 tbsp
sugar
1/4 cup
balsamic vinegar
1 tbsp
unsalted butter
4
slices bread (such as sourdough or brioche)
4
slices sharp cheddar cheese
1 cup
kale leaves