Could the prospect of a Big Mac be all it takes to convince Kim Jong-un to curtail his nuclear ambitions?

North Korean officials said the isolated regime wants to modernise its economy and become a 'normal country' during a dinner that followed the recent historic summit between Kim and South Korean president Moon Jae-in.

Chung-in Moon, a special adviser to president Moon who attended the dinner in April, recently revealed that North Korea wants American investments to deliver a boost to the nation's economy.

US companies establishing operations in Pyongchang would also provide a guarantee to North Korea's security.

Kim Jong-un (left, with Singapore's Prime Minister Lee Hsien Loong) is in Singapore ahead of a historic summit with US President Donald Trump on Tuesday

'They want to be a normal country, a normal state, to be recognised by the United States,' Chung-in told CNN International.

'They welcome American sponsors and multilateral consortiums coming into North Korea.'

Asked for examples, Chung-in suggested McDonald's and a Trump-branded tower as examples of what would be 'modern' in North Korea.

However, such investments would be near impossible unless economic sanctions against the North are lifted.

But last month, US Secretary of State Mike Pompeo said the US is prepared to offer North Korea security assurances and bountiful private investment if it makes the strategic choice to give up its nuclear weapons.

North Korean officials said the isolated regime wants to modernise its economy during a dinner that followed the the recent summit between Kim and South Korean president Moon Jae-in pictured together on April 27)

A South Korean official said North Korea wants US investment, like McDonald's, to help its economy

The US price for normalisation - complete, verifiable and irreversible denuclearisation - is one Pyongyang has never before been willing to pay, seeing nuclear weapons as the ultimate guarantee of the regime's survival.

But after the April summit, Kim and Moon signed a joint declaration detailing their joint goal to work towards a 'complete' denuclearisation of the Korean Peninsula.

And it could be on the cards with another historic summit between Kim and Donald Trump set for Tuesday.

Pompeo dangled the prospect of US investment in North Korea, with upgrades in energy, infrastructure, technology and agriculture, if a deal is struck.

'This will be Americans coming in... to help build out the energy grid -- they need enormous amounts of electricity in North Korea; to work with them to develop infrastructure, all the things that the North Korean people need, the capacity for American agriculture to support North Korea so they can eat meat and have healthy lives,' he said.

After the April summit, Kim (left) and Moon (right) signed a joint declaration detailing their joint goal to work towards a 'complete' denuclearisation of the Korean Peninsula

'Those are the kind of things that, if we get what it is the President has demanded - the complete, verifiable, irreversible denuclearisation of North Korea - that the American people will offer in spades.'

Pompeo, who has met twice with Kim, described him as well-informed and attuned to Western media coverage, a leader 'who knows his brief' and what he wants to achieve.

The secretary said he was 'convinced' Kim shared US goals.

'We will have to provide security assurances, to be sure,' Pompeo said.

'This has been the trade-off that has been pending for 25 years. No president has ever put America in a position where the North Korean leadership thought that this was truly possible.'