Choose colours:quinacronone rose, ultramarine blue, raw sienna, neutral tint

 oniongarlic1    oniongarlic2    oniongarlic3

Roughly sketch the onions and garlic with a soft (B) pencil. Mix up quiacronone + blue paint wet-in-wet  Leave white highlights (you can remove paint with a clean dry brush or blot out with kitchen paper. DRY

 

mix blue + pink + neutral tint start with lighter areas adding more of the same colours. Keep the shape of the garlic

 

  Add raw sienna + pink for onion keep highlights and mix more pigment for shadow area next to the garlic.Add some neutral tint at bottom while paint is still wet

 

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Add in the lines on the red onion with a fine brush - keep to the shape of the onion. Add in some darker tones on the garlic - keep t the 3D shape    Add in the shadow, darkest nearest to the subject lighter as you move away. Add in the roots with a white pen or white gouache