1. Slice and saute onion in oil on medium heat, adding diced garlic after a couple minutes.
2. Continue sauteing peppers, squash, diced ginger and boc choy stems over medium low heat.
3. When peppers are of desired tenderness, add lemon juice, soy sauce, brown sugar, and sliced greens. Simmer for a minute, stirring. Some of the squash will break down and become part of the sauce. Serve over rice or rice noodles.