Strawberry Romaine Salad

Salad:
1 head romaine
2 bunches spinach
1 pint strawberries, sliced
1 red onion, sliced

Dressing:
1/2 c. mayo
2 T. white wine vinegar
1/3 c. white sugar
1/4 c. milk
2 T. poppyseeds

Shake in a jar until blended.
*Really good with candied walnuts added to it