She says: "Let's promote the "eating French" especially in (school) canteens where our children must take advantage of healthy, quality products".
Most polls see Le Pen trailing her centrist rival Emmanuel Macron 40 points to 60, and she has to widen her support if she can hope to beat him in the run-off on May 7.
The two have been at odds since Marine Le Pen launched moves to clean the National Front's image of xenophobic associations in the run-up to the campaign for the 2017 presidency.
The euro was little changed at $1.087 early on Tuesday, retaining Monday's 1.3 percent gain, its strongest one-day performance in 10 1/2 months, that lifted it to a 5 1/2-month high.
One potential negative against the dollar is the risk of a U.S. government shutdown, Okagawa said.
"Emmanuel Macron attracted in his wake France that is doing well, an optimistic France, while Marine Le Pen has attracted the France that has been left behind by globalisation", said Adelaide Zulfikarpasic of BVA Opinion.
Surveying Le Pen's results against more than a dozen such measures, the data suggest her message played particularly well in low-income areas with higher numbers of school dropouts. Le Pen is one of the candidates who is against the European Union, but many investors expect Macron ultimately to be victorious.
Jean-Marie Le Pen, who repeatedly has been convicted of crimes based on anti-Semitism and racism, founded the far-right National Front party that his daughter Marine now leads.
Opening the battle for second-round votes, Le Pen highlighted the continuing threat of Islamist militancy, which has claimed more than 230 lives in France since 2015, saying the 39-year-old Macron was "to say the least, weak" on the issue.
Analysts said Le Pen might find more support amid right-wing voters anxious by security issues and Europe's open borders, who backed either conservative Francois Fillon or nationalist Nicolas Dupont-Aignan in the first round and might balk at backing Macron, a moderate centrist.
Global markets reacted with relief to Sunday's vote, which broke the dominance of established parties of the centre-left and centre-right but still left the most market-friendly and internationally minded of the remaining contenders in pole position to become France's next leader. The party has years of xenophobic, anti-immigration, anti-Semitic and other racist behavior and rhetoric to overcome, in spite of Ms. Le Pen's purging the party's founder (her father, Jean-Marie Le Pen).
She follows in the footsteps of her father Jean-Marie, who made it through to the 2002 presidential run-off in what was a political natural disaster for France, but went on to suffer a stinging defeat.
A Harris survey saw Macron going on to win the run-off against her by 64 percent to 36. He said on Monday that he would not be at the forefront of his party's parliamentary campaign.