teriyaki beef noodles

Ingredients

• 4 tablespoons canola oil, divided plus more as needed
• 1 pound top sirloin steak, cut into thin strips
• 1/2 cup carrot, thinly sliced
• 3 ounces red peppers, thinly sliced
• 3 ounces yellow peppers, thinly sliced
• 6 ounces snap peas, ends trimmed
• 4 large green onions (white parts only), thinly sliced
• 1 1/2 tablespoons ginger, minced
• 3 large cloves garlic, pressed
• 1/4 teaspoon red pepper flakes, or to taste
• ground himalayan sea salt, to taste
• freshly ground black pepper, or to taste (i always use mixed peppercorns)
• 1 cup teriyaki sauce
• 1 tablespoon cornstarch (mixed with 1/2 cup cold water)
• 10 ounces udon noodles, cooked according to package directions
• 2 teaspoons sesame seeds
• 4 large green onions (green parts only), sliced diagonally for garnish