Slaw with mushrooms, peas, and carrots

The title says it all. For a tasty coleslaw, combine:

• 1 small green cabbage, stem removed, sliced fine
• 1 lb shelling peas, shelled (yields about 1 cup)
• 1/2 bunch purple carrots, thinly sliced
• 2 oz brown button mushrooms, sliced
• salt
• olive oil
• Moscatel vinegar