INGREDIENTS
4
portobello mushroom caps
2 tbsp
balsamic vinegar
1 tbsp
low sodium soy sauce
1 tbsp
olive oil
1 tbsp
chopped rosemary
1 1/2 tsp
steak seasoning like Montreal Steak Grill Mates
4
thick slices red onion
4 oz
reduced fat Swiss, sliced thin (Alpine lace)
4
thin slices tomato
1/2
avocado, sliced thin
baby spinach
4
whole wheat low calorie buns (I used Martin)