Berry Cheesecake Streusel Bars

Crust:
1/2 cup Oatmeal
3/4 cup all-purpose flour
3/4 butter stick
1/2 cup sugar
1/2 tsp cinnamon
1/4 tsp nutmeg
1/4 tsp salt

Filling:
450 g cream cheese
1/2 cup sugar
2 tbsp all-purpose flour
1 egg
1 tsp vanilla

3 cups berries
2 tbsp sugar
1 1/2 tbsp cornstarch
Lime juice