1 pound Ground Beef (93% or leaner)
1 cup fresh blueberries
2 tablespoons Dijon-style mustard
2 tablespoon balsamic vinegar
2-1/2 teaspoons minced garlic, divided
2 teaspoons Worcestershire sauce
1/3 cup ground flax seed or meal
1/2 teaspoon salt
1/2 teaspoon pepper
4 cups lightly packed mixed salad greens
2 ounces crumbled feta cheese
Combine blueberries, mustard, vinegar, 1/2 teaspoon garlic and Worcestershire in food processor bowl. Pulse on and off until slightly chunky; reserve 1/2 cup of blueberry mixture for topping. Combine remaining blueberry mixture, ground beef, remaining 2 teaspoons garlic, flax, salt and pepper in medium bowl, mixing lightly but thoroughly. Lightly shape into four 1/2-inch thick patties.
Heat large nonstick skillet over medium heat until hot. Place patties in skillet; cook 10 to 12 minutes or until instant-read thermometer inserted horizontally into center registers 160°F, turning occasionally.
Serve burgers on a bed of mixed greens; top with reserved blueberry sauce and cheese.
Nutrition information per serving: 283 Calories; 126 kcal Calories from fat; 14 g Total Fat; 5 g Saturated Fat; 4 g Monounsaturated Fat; 87 mg Cholesterol; 722 mg Sodium; 15 g Total Carbohydrate; 4.6 g Dietary Fiber; 28 g Protein; 5.1 mg Iron; 5.3 mg Niacin; 0.5 mg Vitamin B6; 2.4 mcg Vitamin B12; 6 mg Zinc; 20.7 mcg Selenium; 77 mg Choline;