Broccoli and Grape Salad

2-4 c. broccoli heads
1# bacon, fried, crumbled
6 scallions or 1 sm onion
2 c. chopped celery
2 c. red grapes
1 c. raisins
1 c. slivered almonds

c. milk
1 c. mayo
1 Tb. vinegar
c. sugar