Preheat a grill to medium high heat and oil the grate.
Combine the lamb, onion, cilantro, cumin, coriander, garlic, and salt in a bowl and mix well. Divide the mixture into 8 small patties.
Brush both sides of the eggplant slices with olive oil and season with salt and pepper.
Grill the eggplant until tender, about 4-5 minutes per side.
Grill the lamb burgers for 6-7 minutes per side until desired doness is reached (internal temperature of 160°F for medium).
Stack each burger on an eggplant slice and top with chutney, lettuce, tomato and another slice of eggplant.