Make the Sauce In a medium bowl, whisk together 2 tablespoons of maple syrup, ¼ cup of coconut aminos, 2 tablespoons of rice vinegar, 1 tablespoon of toasted sesame oil, and a pinch of red pepper flakes. If you want a thicker sauce, add 1 tablespoon of arrowroot powder or cornstarch.
Cook the Beef In a large skillet, heat 1 tablespoon of olive oil over medium-high heat. Add 1 pound of ground beef and cook for about 6-8 minutes until it’s browned and cooked through, breaking it up with a spatula.
Add Aromatics Stir in 2 minced garlic cloves and 1 tablespoon of grated fresh ginger into the skillet with the beef. Cook for an additional 1-2 minutes until fragrant.
Add Vegetables Toss in 1 finely diced red bell pepper and 1 cup of shredded carrots. Stir and sauté for about 3-4 minutes until the vegetables are tender-crisp.
Simmer the Sauce Pour the prepared sauce over the beef and vegetable mixture, stirring to combine thoroughly. Allow it to simmer for about 3-5 minutes on low heat.
Finish with Green Onions Gently stir in 2 sliced green onions and remove the skillet from the heat.
Assemble and Enjoy Using large leaves of Boston Bibb lettuce, spoon the savory filling into the center. Optionally, garnish with sesame seeds.