Preheat the oven to 450 Line a baking pan with foil
Roast jalapeos until tender, about 15 minutes
Meanwhile melt butter in a skillet, add onion and garlic and soften. Season with salt and pepper
Add chicken broth and mustard powder and cook to reduce by 1/2
Add cream, lemon zest and juice and reduce to a light creamy sauce. Season with salt and pepper
In a food processor or blender place the roasted peppers, Remove seeds and membrane for a mild sauce, keep peppers intact for a hot sauce or remove only some seeds on a couple for a moderate sauce. Add cream mixture and blend smooth
Add basil and stir in
Toss with pasta or serve as a sauce for meats or seafood
