Lentils, baby spinach, and pinenuts make up the savory mixture for Veggie Sliders with Red Onion Jam. Top this veggie burger with blue cheese, baby arugula, and our Red Onion Jam.
Combine first 3 ingredients in a saucepan over medium-high heat. Bring to a boil, reduce heat to medium-low, partially cover, and simmer 28 minutes or until lentils are softened and liquid is absorbed. Transfer to a bowl; mash with a potato masher.
Heat 1 1/2 tablespoons oil in a large nonstick skillet over medium heat. Add shallots, and sauté 5 minutes or until softened. Add spinach and next 3 ingredients; sauté 3 minutes or until spinach wilts.
Stir together lentil mixture, spinach mixture, breadcrumbs, and pine nuts until well combined. Cover and chill 1 hour.
Press mixture into 6 patties. Heat remaining 1 1/2 tablespoons oil in a nonstick skillet over medium-high heat. Sauté burgers 2 minutes on each side or until well browned.
Spoon about 3 tablespoons Red Onion Jam onto roll bottoms. Top with burgers, blue cheese, arugula, and bun tops.