Ingredients:

• Salsa:
• 1/4 cup finely chopped pineapple
• 1/4 cup finely chopped mango
• 1/4 cup finely chopped tomatillo
• 1/4 cup halved grape tomatoes 
• 1 tablespoon fresh lime juice
• 1 serrano chile, minced
• Burgers:
• 1 1/2 cups water
• 1/2 cup dried lentils
• Cooking spray
• 1 cup chopped onion 
• 1/4 cup grated carrot
• 2 teaspoons minced garlic
• 2 tablespoons tomato paste
• 1 1/2 teaspoons ground cumin
• 3/4 teaspoon dried oregano
• 1/2 teaspoon chili powder
• 3/4 teaspoon salt, divided
• 3/4 cup cooked pearl barley
• 1/2 cup panko (Japanese breadcrumbs)
• 1/4 cup finely chopped fresh parsley
• 1/2 teaspoon coarsely ground black pepper 
• 2 large egg whites**
• 1 large egg**
• 3 tablespoons canola oil, divided

Preparation

1. 1. To prepare salsa, combine first 6 ingredients; cover and refrigerate.
2. 2. To prepare burgers, combine 1 1/2 cups water and lentils in a saucepan; bring to a boil. Cover, reduce heat, and simmer 25 minutes or until lentils are tender. Drain. Place half of lentils in a large bowl. Place remaining lentils in a food processor; process until smooth. Add processed lentils to whole lentils in bowl.
3. 3. Heat a large nonstick skillet over medium-high heat. Coat pan with cooking spray. Add onion and carrot; sauté 6 minutes or until tender, stirring occasionally. Add garlic; cook 1 minute, stirring constantly. Add tomato paste, cumin, oregano, chili powder, and 1/4 teaspoon salt; cook 1 minute, stirring constantly. Add onion mixture to lentils. Add remaining 1/2 teaspoon salt, barley, and next 5 ingredients (through egg); stir well. Cover and refrigerate 1 hour or until firm.
4. 4. Divide mixture into 8 portions, shaping each into a 1/2-inch-thick patty. Heat 1 1/2 tablespoons oil in a large nonstick skillet over medium-high heat. Add 4 patties; cook 3 minutes on each side or until browned. Repeat procedure with remaining 1 1/2 tablespoons oil and 4 patties. Serve with salsa.
5. **1 egg can be substituted with 1tbsp ground flaxseed with 3tbsp water OR Ener-G Egg Replacer OR 1tbsp soy flour/arrowroot with 2tbsp water.

(Source: myrecipes.com)

Ingredients:

• Aioli:
• 1/4 cup light mayonnaise 
• 1/2 teaspoon fresh lemon juice
• 1 garlic clove, minced
• Burgers:
• 2 cups water
• 3/4 cup dried red lentils
• 3/4 teaspoon salt, divided
• Cooking spray
• 1 cup diced onion 
• 1/2 cup finely diced carrot
• 3 garlic cloves, chopped
• 2 cups chopped mushrooms
• 1 teaspoon dried marjoram
• 1/4 teaspoon black pepper 
• 3 tablespoons Madeira (optional)
• 1/3 cup dry breadcrumbs
• 1 tablespoon fresh lemon juice
• 2 large egg whites
• 1 tablespoon vegetable oil
• Remaining ingredients:
• 6 (1 1/2-ounce) hamburger buns
• Arugula or curly lettuce leaves
• 6 (1/4-inch-thick) slices tomato 
• 6 (1/8-inch-thick) slices onion 

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(Source: myrecipes.com)