Bring a large pot of lightly salted water to a boil. Add spaghettini, and cook until al dente, about 5 minutes. Drain, and set aside.
While the pasta is cooking, slice sausages lengthwise, and remove the casings. Brown sausages in a large skillet over medium-high heat with a drizzle of the olive oil. Remove sausages to a platter, and keep warm in the oven. Add the bell peppers, garlic, oregano and basil to the skillet, and drizzle with the remaining olive oil. Saute over medium heat until peppers are tender.
Toss the pepper mixture with the drained spaghetti until well blended, and season with salt and pepper to taste. Transfer to a serving platter, and arrange the sausages on the top. Garnish with Parmesan cheese.