Place a large deep skillet over medium heat. Add the sesame oil. Once the oil is hot add the shrimp and garlic. Sprinkle with salt and pepper. Sear the shrimp for 2 minutes, then remove them from the pan and place in a holding dish. Next add the snow peas and carrots to the skillet. Sear for 3 minutes, then remove. Finally add the red peppers to the skillet. Sear for 2 minutes, then remove.
Pour 4 cups water to the skillet and 1 teaspoon salt. Once the water comes to a simmer, add the pasta and stir well to separate. Cover the skillet and cook until the water is almost completely absorbed.
Then pour in the coconut milk and red curry paste and stir to coat. Simmer for 2-3 minutes, then add the carrots, snow peas, red peppers and shrimp back to the skillet. Stir and simmer another 2 minutes. Turn off the heat and stir in the thai basil leaves and scallions. Salt and pepper to taste and serve warm.