07/10/2014 at 02:00 PM EDT
has proven she's got moves on the runway, the red carpet and reality television – she was just nominated for an Emmy
for Project Runway
– but who knew she was such an aficionado of the kitchen?
"I am an excellent chopper," the America's Got Talent
judge tells PEOPLE. "I chop all the time, I cook all the time. I'm good at cooking."
For the past 10 years, Klum, 41, has put those skills to good use in the kitchen of God's Love We Deliver
, a nonprofit organization that serves more than 1.2 million healthy meals a year to families who are sick and unable to shop or cook for themselves in the New York area.
"I go into their huge kitchen and chop vegetables and prepare meals," she says. "They are so grateful and happy when they have volunteers. And it makes a huge difference when a parent is too ill, too weak to get out of bed, to have a nutritious meal delivered is one less thing to worry about."
Klum says she enjoys getting out into the community and delivering the meals, surprising people by showing up at their doorstep with healthy foods.
"People are really excited to see you," she says. "I try to put a smile on their faces and cheer them up a little. To have that personal connection with people makes it even more special."
The organization makes a special effort to prepare meals tailored to an individual's dietary needs based on their illness. Klum says as a mom to kids Leni, 10, Henry, 8, Johan, 7, and Lou, 4, she worries about making sure they are eating healthy and knows how much harder it is on parents who are sick.
"I worry all day long, how my children are doing and getting them good food for breakfast, lunch and dinner and making sure they are okay," she says. "What is it like for a mom too weak to get out of bed? Having a healthy meal for the whole family is a big, important thing and one less thing to worry about when are trying to get better."
For more Klum's work with God's Love We Deliver, pick up this week's issue of PEOPLE, on newsstands Friday.