Grandma Wanda’s Cherry Pie

Pit Cherries (2 lbs?)
2 Tbs tap water? or is this about the cherries?
1 C water 1/2 Sugar
Bring to boil stirring all time. Pour over cherries and sprinkle with nutmeg. .
1 sq margerine
1/2 – 3/4 C Brown Sugar
1 C uncooked rolled oats
Spread over top cherries
Bake 300℉ 40m – 1 hr