Mediterranean Burgers

Ingredients

• 1 cup plain nonfat yogurt
• 1 cup diced seeded cucumber
• 1/3 cup chopped fresh dill
• 1 tsp each minced garlic and salt
• 1 lb lean ground meat
• 2 Tbsp plain dry bread crumbs
• 1 box (10 oz) frozen chopped spinach, thawed and squeezed dry
• 1 tsp each minced garlic, ground cumin and salt
• 4 each kaiser rolls, split; crisp lettuce leaves, slices ripe tomato and thin slices red onion