In large pot, bring 3 quarts of water to a boil. When water boils, add noodles, stirring to prevent sticking. Cook until al dente, about 4 minutes. Drain.
Meanwhile, in large wok or skillet, heat oil over medium-high heat. Add bell pepper and garlic and stir-fry 3 minutes. Stir in tomatoes, snow peas and tofu and stir-fry just until tender, about 4 minutes. Add soy sauce and lime juice and bring to; simmer. Cook, stirring often, 2 to 3 minutes. Stir in cooked noodles and cilantro.
Spoon noodle mixture onto warm plates and garnish with cashews, green onions and bean sprouts.