Peach Cobbler with Praline Biscuits

Peach Cobbler with Praline Biscuits 
1 1/2 c Sugar
2 tb Cornstarch
1 ts Cinnamon
1 c Water
8 c Sliced peaches
3 tb Butter
1/4 c Firmly packed brown sugar
1 c Chopped pecans
2 c Self-rising flour
2 ts Sugar
1/2 c Shortening
3/4 c Buttermilk

Combine first 4 ingredients in a Dutch oven. Add peaches. Bring to a boil and cook 1 minute, stirring. Pour into a 13-by-9-inch dish. Combine butter, brown sugar and pecans. Combine flour and 2 tsp sugar; cut in shortening until crumbly. Add buttermilk, stirring until moist. Turn dough onto floured surface and knead 3 or 4 times. Roll dough to 12-by-8 inches. Spread with pecan mixture. Starting with long side of dough, roll up. Cut into 1/2-inch slices. Arrange over peach mixture. Bake at 400 degrees for 25 to 30 minutes.