Rainbow Vegetable Lo Mein

Name: Rainbow Vegetable Lo Mein
Ingredients: ¼ cup low-sodium soy sauce; 3 tablespoons hoisin sauce; 1 ½ teaspoons minced fresh ginger; 2 large cloves garlic, minced; ¼ to ½ teaspoon red pepper flakes; For the lo mein:; 12 ounces uncooked whole wheat spaghetti; 2 tablespoons olive oil; 1 medium red onion, thinly sliced; 1 medium red bell pepper, thinly sliced; 1 medium yellow bell pepper, thinly sliced; 1 large carrot, peeled and cut into thin sticks; 1 ½ cups thinly sliced red cabbage; 1 ½ cups packed fresh baby spinach leaves; chopped fresh cilantro, for garnish; roughly chopped peanuts or cashews, for garnish