Place the nuts in a bowl and add the oil; toss until all pieces are lightly coated.
Spread the nuts in a single layer on a microwave-safe plate, avoiding overcrowding so they toast evenly.
Microwave on high in 1-minute intervals, removing and tossing the nuts between intervals to promote even browning.
Continue 1-minute intervals for a total of 2 to 5 minutes, or until the nuts are golden brown and fragrant; exact time varies by microwave and nut type.
Season with salt, pepper, or other desired seasonings while still warm, then let cool to room temperature before serving or storing.