Brûléed Oatmeal with Baked Apples

2 apples, such as Granny Smith or Baldwin, peeled, cored and cut into wedges 1/4 inch thick 

2 tsp. fresh lemon juice 

1 Tbs. unsalted butter, melted 

2 Tbs. firmly packed light brown sugar 

4 cups milk 

1/4 tsp. salt 

2 cups rolled oats 

1/2 cup firmly packed light brown sugar