Beatrice Salad

Yield:	6 Servings
Categories:	Salad

3/4	lb	Raw mushrooms; cleaned & thinly sliced
2		Medium-sized bunches watercress; stems removed, leaves washed and dried
2	lg	Belgian endive; cut into 1" chunks on the diagonal
		MUSTARD VINAIGRETTE
1	c	Good olive oil
1/4	c	Red wine vinegar
2	tb	Dijon mustard
		Salt and pepper