Spicy Harissa Shrimp Lettuce Wraps

Name: Spicy Harissa Shrimp Lettuce Wraps
Ingredients: 1 bunch Cilantro, Divided; Fresh Basil, Sliced, For Topping (optional); 1 Tablespoon Olive Oil; ½ whole Yellow Onion, Chopped; 4 ounces, weight Shiitake Mushrooms, Sliced; 1 pound Shrimp, Chopped Into Bite Size Pieces; 3 cloves Garlic, Minced; 1 Tablespoon Harissa Paste; 2 Tablespoons Lite Soy Sauce; 1 pinch Brown Sugar; 1 bunch Green Onions, Sliced; 1 head Lettuce (romaine, Butter, Boston); ¼ cups Chopped Cashews, For Topping (optional); 1 whole Lime