This is effectively a "no bake" bar, except for the fact that the oats get lightly browned in the oven before the mixing begins. What's important is to 1) Get the syrup good and hot before adding it to the cereal 2) Stir it together very quickly so that the syrup coats the dry bits before it starts to cool and 3 ) Press the mixture very firmly into the pan so the bars hold together well.
While the oats brown, put the cereal, pretzel sticks, peanuts, and dried cranberries into a large bowl.
Line an 8-inch-square baking pan with enough parchment that it drapes over two sides. Transfer the cereal mixture to the pan and use your hands to press down on the mixture until it is one solid block that fills out the pan evenly. Put a piece of parchment between your hands and the bars to keep them from sticking as you press.
If you can't find brown rice syrup, you can use honey, though the bars won't stick together quite as well. You can also look for organic corn syrup.