Heat Oven to 250 degrees
greese 9x13 pan
Heat brown sugar, margarine, corn syrup , and salt in 2 quart saucepan over medium heat
Cook, uncovered, stirring occasionally, for 2 minutes longer.
Remove from heat, stir in baking soda until foamy and light colored.
Pour over cheerios, peanuts, raisins, and M&Ms in 4 quart bowl
Stir until mixture is coated and spread evenly in pans
Bake for 15 minutes.
Stir, let stand until cool, about 10 minutes
Loosen mixture with metal spatula and let stand until firm, about 30 minutes
Break into bite-size pieces
