In a medium bowl, mix together the raspberries, rhubarb, sugar, and salt. If your raspberries are not sweet, you might consider adding another 2 tablespoons or 1/4 cup of sugar. Set aside.
Use a food processor to grind the Cracklin' Oat Bran into a powder that resembles oat bran. In a medium bowl, mix this with the walnuts and pecans. Using your fingers, work the butter into the dry ingredients until you have clumps.
Dump the fruit into a 9- or 10-inch ovenproof skillet or baking dish. Top with the Cracklin' Oat Bran crumble. Bake for 30 to 40 minutes, until the fruit is bubbling and the top is golden-brown and crisp.
A (former) student of English, a lover of raisins, a user of comma splices. My spirit animal is an eggplant. I'm probably the person who picked all of the cookie dough out of the cookie dough ice cream. For that, I'm sorry.