In a large bow, mix together all dry ingredients. Add butter, maple syrup, rum, nutmeg and vanilla to evenly coat the oats. Add nuts and dates and combine.
Line a baking sheet with parchment, spread mixture evenly, and bake for 30 minutes. Remove, stir well, and redistribute on the sheet. Return to oven and bake for an additional 15 minutes.
Ovens differ - and watch as you bake, a light golden brown color is the goal.
Remove and let cool (cooling will crisp the granola). Serve with milk (whole, oat, almond ...) over yogurt, with fresh fruit. Enjoy as a dessert with ice cream.