Heat oil in large, deep skillet or wok (if you have one.) Add ground meat (or tofu) and stir until just starting to brown. Add garlic and jalapenos; continue to stir until all meat is lightly browned and garlic and jalapenos become fragrant.
Add hoisin, sesame oil, sambal oelek and maple syrup, stir until combined.
Stir in water chestnuts and green onions, let simmer for a few minutes to let everything meld together.
Right before serving, stir in toasted cashews. Garnish with cilantro (and anything else your heart desires.)
Serve with lettuce leaves (as demonstrated below.)