In a large saucepan, heat the oil and saute the onion and red pepper in it over medium heat for about 4 minutes.
Add the bananas and pineapple and orange juice. Simmer over medium heat for 5 minutes, until the bananas are soft.
Remove from the heat, add the lime juice, cilantro, chile peppers or Inner Beauty sauce, and 3 tablespoons of the Parmesan cheese, and mix well.
In 4 quarts of boiling salted water, cook the fettuccine until al dente, about 8 to 10 minutes for dried pasta, 3 to 4 for fresh. Drain and put it into a stainless steel bowl.
Add the spicy mixture, butter, and mix well. Season with salt and pepper to taste and garnish with the remaining grated Parmesan cheese.