Open-Faced Steak, Pear, and Gorgonzola Sandwiches

INGREDIENTS

Cooking spray

1 lb

flank steak, trimmed

1/2 tsp

salt

1/2 tsp

freshly ground black pepper

1 cup

thinly sliced red onion, separated into rings (about 1/2 onion)

small Bartlett pears

3 tbsp

bottled lemon juice, divided

2 tbsp

white wine vinegar

1 tbsp

water

1 tsp

olive oil

1 tsp

bottled minced garlic

6 cups

prewashed gourmet salad greens

1/4 cup

crumbled Gorgonzola cheese

Mediterranean-style white flatbread (such as Toufayan)