Line 8- by 8-inch pan with parchment paper. Toss raisins, oats, walnuts, coconut, salt, and vanilla in large bowl to combine. Place mixture in food processor (if too small to fit entire batch, do in 1/2 batches) and process just until mixture forms large clumps.

Transfer mixture back to large bowl, add sunflower seeds, and press with hands to form one large mass. Firmly press into pan and let sit until set, about an hour. Remove from pan and cut into bars.