01 - Combine coriander seeds, cumin seeds, and black peppercorns in a small heavy-bottomed saucepan and toast over medium heat for 2 to 3 minutes, stirring frequently until fragrant.
02 - Incorporate olive oil, garlic slices, cinnamon stick, smoked paprika, and red pepper flakes into the pan.
03 - Lower heat to gentle simmer and let the oil infuse for 7 to 8 minutes, stirring occasionally and ensuring garlic does not burn.
04 - Remove from heat and allow to cool to room temperature.
05 - Strain the infused oil through a fine mesh sieve into a clean airtight glass bottle or jar, discarding solids.
06 - Refrigerate up to 2 weeks. Bring to room temperature before serving.