Heat oil & butter in a small pan over medium high heat. Sear the sausage on all sides then reduce heat to medium-low.
Add the onions & peppers and stir to combine. Cover and cook for 2-3 minutes, then mix in the garlic, basil, Italian seasoning, and chicken stock cubes. Cover and simmer 15-20 minutes until the sausage is cooked through.
Cook pasta to desired tenderness. Remove the sausage from the pan, mix the pasta into the peppers with the milk and yogurt mixture. Use the pasta water to thin the sauce and bring everything together. Simmer uncovered for just a few minutes to reduce.
I have always cooked, I was that person who could make a meal from an empty fridge. I have lived alone and with large and small families, I have cooked for camps on wood stoves, and in professional kitchens. I have lived and worked all over the west from Montana, to Seattle to Arizona to San Diego. I have traveled, maybe not 'all over the world', yet, and have collected tastes recipes and techniques everywhere, and every one I meet.