Infuse oil: Add grapeseed oil, red pepper flakes, garlic, and salt to a small saucepan. Warm over low heat, until you see small bubbles in the oil and the garlic smells fragrant, 4 to 5 minutes. Stir or swirl the pan frequently to prevent garlic from browning.
Use or refrigerate: Transfer contents to a clean heatproof jar. Either use immediately - or refrigerate and use within 2 to 4 days.
