Asian Lentil Lettuce Wraps - Half Cup Habit

Ingredients

• 1 cup lentils, red (picked over and rinsed)
• 1 1/2 tbsp olive oil
• 1 cup bell pepper (red; chopped)
• 3/4 cup onion (yellow; finely chopped)
• 1 cup carrot (matchsticks)
• 1 tbsp garlic (minced)
• 1 tbsp ginger (fresh; peeled and minced)
• 1/4 cup hoisin sauce (or more to taste)
• 2 tbsp soy sauce (or more to taste)
• 1 1/2 tbsp rice vinegar
• 1 tsp sesame oil
• 1 8 oz can water chestnuts (drained and chopped)
• 1/2 cup walnuts (chopped)
• 1/4 cup green onions (chopped)
• 2 tbsp cilantro (chopped)
• sesame seeds (for garnish (optional))
• 1 head lettuce (iceberg or butter lettuce, leaves separated, rinsed and dried)