In a saucepan, heat the olive oil over medium heat. Add the chopped onion and garlic, and sauté until softened.
Stir in the rice and cook for 2-3 minutes, until the rice is slightly toasted.
Add the vegetable broth, parsley, mint, lemon juice and zest, salt, pepper, and cumin. Bring to a boil, then reduce heat, cover, and simmer for 15 minutes or until rice is cooked.
Remove the rice from heat and allow to cool slightly. Prepare a large pot with a bit of water at the bottom.
Take one grape leaf and place about a tablespoon of the rice filling near the stem end. Fold the sides over, then roll up gently from the stem to the tip.
Repeat this process with the remaining grape leaves and filling.
Place the stuffed dolmades seam-side down in the pot. Pour a little water over them and cover the pot with a lid.
Cook on low heat for about 30 minutes, until heated through.
Serve with a drizzle of lemon juice and remaining rice on the side.
Notes
Feel free to add other vegetables like chopped carrots or bell peppers to the filling for extra flavor.If using jarred grape leaves, make sure to rinse them before using to remove excess brine.For a spicier flavor, consider adding crushed red pepper flakes to the rice mixture.