Start water boiling for pasta. Meanwhile, chop tri tip and red peppers into bite sized pieces.
Cook pasta according to package directions. Reserve ½ cup pasta water from cooking.
While pasta cooks, melt butter in a large skillet and add garlic. Once fragrant add red peppers and saute for 2 minutes.
Add cream to skillet and cook another 3 minutes, then add half the parmesan cheese and melt it into the sauce. Once cheese is melted add tri tip and pasta.
Add spinach until mostly wilted add pasta to the skillet and thin sauce with pasta water if needed. Serve warm with remaining parmesan.
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Notes
Recipe is for 4 lunch portions or 2 generous dinner portions.Add spinach one handful at a time so it doesn't overwhelm the skillet.
Nutrition information is provided as a courtesy and is an estimate. It is recommended to use your preferred calculator with the actual ingredients you use for optimal accuracy.