In a food processor or powerful blender, blend cooked lentils, barley, onion, oil, tobasco, and garlic. Put the lentil mixture into a large bowl and add the salt, dill weed, oregano and thyme; gently combine ingredients until just incorporated.
Form patties and place on wax or parchment paper. Coat each side with a little flour before cooking.
Grill or sear the patties over medium high heat for 2-3 minutes per side or until browned and heated through, 6 minutes total.
Serve lentil burgers on whole wheat hamburger buns with lettuce, tomato and pickles or preferred garnishes.