Serena Williams participated in the #GiveFromTheCart Challenge to benefit Feeding America. She and her family made the first donation of 50-thousand meals to Instacart. The grocery delivery will match each donation, up to a million meals.

If you want to participate, just donate the value of your last grocery cart – or an amount of your choosing – to Feeding America. Then take your groceries from your pantry or fridge and form them into the shape of a heart, take a photo, and share it on social media with Instacart #GiveFromTheCart Challenge – and encourage others to do the same.