This is a classic steakhouse-style spinach salad with the absolute best warm bacon-mustard dressing I've ever had! Looks and tastes like a lot of work, but can be prepared in no time! This salad can easily be converted to a main dish salad by adding strips of grilled chicken breast.
The secret ingredient which makes this cacciatore stand out is pancetta, an Italian bacon. The pancetta gives the sauce richness and body. Fresh basil leaves and baby portobello mushrooms make it special.