INGREDIENTS
1
lbs ground beef
1
teas Worcestershire sauce
1
teas fresh snipped parsley
1/2
teas fresh thyme
1/2
teas garlic salt (plus a dash)
1/4
teas pepper
2 tbsp
olive oil
1
onion (sliced)
2 tbsp
white wine
sliced Gruyere cheese
1 tbsp
coarse grain mustard
1 tbsp
mayo