Chocolate chips, coconut flakes, mini peanut butter cups, peanut butter chips, etc.
In a small or medium mixing bowl, stir together oats, cinnamon, and salt.
In a small, microwave safe-bowl or measuring cup, heat honey and peanut butter together in microwave for about 20 seconds, or until softened.
Pour peanut butter and honey mixture over oats, add peanuts, and stir to combine.
Line a baking sheet with parchment paper and spread oat mixture out in a single layer. Press oats together firmly with a spoon or spatula (this will help it stick together in clusters).
Bake at 325 for 20-23 minutes, using a spoon or spatula to flip pieces halfway through (don't intentionally break up the clusters). Bake until granola is starting to lightly brown. Remove baking sheet from oven and press granola down and together (to help form clusters), then leave it to cool.
Once cooled, add any additional mix-ins like chocolate chips, coconut flakes, mini peanut butter cups, or peanut butter chips Break into large clusters and enjoy! For optimal freshness, store in a ziploc bag or air-tight container for up to 5 days, or freeze for up to several months.