Creamy Sweet Potato Salad

2 cups mayonnaise
1/3 cup buttermilk
2 tablespoons lemon juice
1 tablespoon dijon mustard
1 teaspoon sugar
3 pounds sweet potatoes; cooked -- peeled and cubed
1 cup peas
1/2 cup sweet red pepper -- or green
1/2 cup green onions -- sliced
1 bunch fresh spinach
3 bacon strips -- cooked, crumble

In a bowl, blend mayonnaise, buttermilk, lemon juice, mustard and sugar until smooth.

In a large bowl, combine sweet potatoes, peas, pepper and onions. Pour dressing over all and toss to blend. Chill at least two hours or overnight.

TO SERVE: Spoon salad into a large brown lined with spice and and top with bacon.