The America's Got Talent judge, 63, was spotted at John's Garden, a lunch and snack bar serving up healthy food, salads, soups and juices near Malibu lagoon. Music mogul Simon's $24million (£18.3million) Malibu beach house is just one of the homes in his lavish property portfolio.
Simon looked cool and casual in cargo shorts, a slate grey knit jumper and trainers as his fiancée donned white linen trousers and a nude tank top.
Eric, who looked almost as tall as Simon, wore a football tee and black shorts as he tucked into a chocolate ice cream delivered to the table by his lookalike dad.
Simon, who was a self-proclaimed bachelor before starting a family with Lauren, 46, in 2014, has a heartwarming relationship with his son.
Speaking to Entertainment Tonight in February 2022, Simon revealed the couple's son Eric had a major role in his proposal to Lauren. "One hundred percent he had to coach me. And we planned it. He was a big part of it."
Simon previously admitted that becoming a father changed his life, and has spoken about whether he would expand his family with Lauren.
"Before Eric, my life was 99 per cent work. I was obsessed with it," he admitted in a new interview with The Sun, before adding: "Now Eric is around, I don't work through the night anymore. If he hadn't come along, God knows what would have happened."
Doting Simon also spoke exclusively to HELLO! at the Variety Club Show Business Awards in November, commenting on the moment Lauren mentioned their son in her speech.
He told us: "[Fatherhood] changed my life. I mean, I adore him." Simon then went on to praise their son's upbringing, and how kind Eric is.
"He just is. I mean, genuinely he is kind," he continued. "Some people are and some people aren't. But that's just him, he is kind."