Preheat overn to 325-degrees F. In medium bowl combine flour, soda, cinnamon and oats. Mix well with a whire whisk. Set aside. Cream sugar and butter in a large bowl using an electric mixer set at medium speed. Add the flour-oat mixture, and blend at low speed until just combined. Do not overmix. Separate dough into two balls, flatten them into disks, and wrap each tightly in plastic wrap or a plastic bag. Chill 1 hour. On floured board using a floured rolling pin, roll out one disk to 1/4 inch thickness. Cut cookies with a 2-inch round fluted cookie cutter dipped in flour. Repeat procedure with the second disk, reworking scraps until all the dough is used. Bake cookies on ungreased baking sheets 1/2 inch aprt for 13-15 minutes or until bottoms turn light brown. Transfer immediately to a cool, flat surface with a spatula. When cookies are cool, spread 1 tablespoon of peanut butter filling on the bottom side of a cookies. Top with another cookie-bottom side toward the filling-to make a sandwich. Repeat with the remaining cookies and filling Yield: 3 1/2 dozen cookies. Posted to MM-Recipes Digest by hdbrer@ibm.net on Jul 07, 99