Heat peanut oil in a sauté pan until it begins to shimmer. Add sliced shiitake mushrooms and sauté on high heat for approximately 2 minutes. Add soy sauce and continue to sauté until dry. Remove from heat and place in bowl. Add Tabasco, vinegar and salt and pepper. Add olive oil to pan and place over medium heat. Add red onions and cook slowly until translucent. Remove from heat and toss with mushrooms. Reserve.
Toss together Ready Pac Foods® Spinach with Tender Butter Blend. Add marinated mushroom mixture and toss. Add just enough balsamic dressing to lightly coat. Serve Immediately.
Whisk together all ingredients, reserving the oil. In a slow steady stream, whisk Extra Virgin Olive Oil into vinegar and mustard blend until a temporary emulsion forms. Just before serving, whisk vinaigrette to recombine and adjust seasoning. Add fresh herbs.