Bezos joked with reporters that he did not have his "last meal" before taking off on his space travel company's first flight with people on board.

As the Amazon and Blue Origin founder served food to members of the press gathered at the remote rocket launch site in the West Texas desert, one reporter jokingly asked: "Is this your last meal?"

"Hey, did somebody say 'last meal?'" Bezos, wearing a cowboy hat and sunglasses, responded to laughter. "I don't think we should put it that way. Let's talk about it in a different way."

Chicken thighs, mac 'n' cheese and black-eyed peas were on the menu -- a "favorite" recipe by Bezos' grandmother. He also handed out copies of the recipe.

"Now, if you don't like this, just keep it to yourself," Bezos said to more laughter.

Bezos told reporters that he and his three crewmates had finished their training.

"We're going to have a little refresher early tomorrow morning," he added. "We have an early wake up tomorrow."

Liftoff of the inaugural Blue Origin flight is scheduled for 9 a.m. ET from a rural complex just north of Van Horn, Texas.

In total, the flight will be 11 minutes, with approximately three minutes spent above the so-called Karman line that is defined by some as the boundary between Earth's atmosphere and outer space. After re-entry, the astronauts are set to descend back to Earth in their capsule with a parachute-landing in the west Texas desert.

ABC News will carry live coverage of the event, which will also be streamed on Blue Origin's website. The live broadcast will begin at 7:30 a.m. ET. Unlike most spaceflights, there are no on-site public viewing areas in the vicinity of the launch site. The newly-minted astronauts are set to have a press conference shortly after landing back on earth.

There is no pilot aboard the fully-autonomous capsule. While Blue Origin's New Shepard has flown 15 test flights, Tuesday's will be the first with humans on board.

The definition of "space" has emerged as a heated debate point in the new space race, as Sir Richard Branson took heat for not passing the Karman line (roughly 62 miles above earth) during his Virgin Galactic spaceflight earlier this month. Neither Blue Origin nor Virgin Galactic's flights will reach Earth's orbit, however, the way Elon Musk's SpaceX missions have. Musk, also a billionaire player in the new space race, on Twitter has called out this "big difference."

While the modern space race has become the arena of the ultra-wealthy at a time when a global pandemic on earth has exacerbated inequities, some argue the rise of private sector involvement has saved NASA money and accelerated technological advances -- which in the long-term has the potential to open up space tourism to all who have been curious about the cosmos.

Still, the billionaire daredevils using themselves as guinea pigs for their private space tourism firms have not had the same support astronauts garnered during the original U.S.-Soviet space race. Animosity was exacerbated by reports that Bezos and Musk have avoided income taxes. A petition calling for Bezos to stay in space has garnered headlines and more than 160,000 signatures.

In an interview with ABC News' "Good Morning America" just one day ahead of the spaceflight, Bezos said he is curious how briefly leaving Earth will "change" him.

"I don't know what it's going to mean for me," Bezos said. "I don't know, I'm very curious about what tomorrow is actually going to bring. Everybody who's been to space says it changes them in some way. And I'm just really excited to figure out how it's going to change me."