Step 1 Place the mint leaves, cilantro, lime juice, garlic, 1/2 teaspoon of salt and the pepper in a blender. Start blending, then slowly drizzle in the olive oil. Puree until smooth, about 1 minute.
Step 2 Pour half into a large bowl, add the shrimp and marinate for 10 minutes. Reserve the remaining half of the marinade for the noodles.
Step 3Meanwhile, bring a large pot of water to a boil and add the remaining 1 tablespoon of salt. Break the noodles in half and cook until al dente, about 4 minutes. Drain and keep warm.
Step 4Heat a large skillet on high and add the canola oil. Drain the shrimp and discard the marinade. Cook the shrimp until pink and slightly firm, 3 to 4 minutes. Stir in the diced tomatoes and cook for 1 minute. Add the hot noodles and reserved marinade and stir until incorporated and steaming hot. Serve immediately or let cool, then refrigerate.